ANALYSIS – Feed Water Analysis

Feed Water Analysis
Feed water analysis involves analysing the actual feed water contained in the feed tank or drain water that has passed through the substrate. Feed water can also be taken directly from a substrate, such as rock wool slabs, using a sample syringe. Analysis of drain water allows you to determine what the plants have absorbed and what that have not absorbed, which is often more important.
This type of analysis determines the following values.
Acidity |
pH |
EC – Electrical Conductivity |
mS/cm 25°C |
|
|
Cations – mmol/l |
|
Ammonium |
NH4+ |
Potassium |
K+ |
Sodium |
Na+ |
Calcium |
Ca+ |
Magnesium |
Mg+ |
Silicon |
Si+ |
|
|
Anions – mmol/l |
|
Nitrate |
NO3– |
Chloride |
Cl– |
Sulphur |
S– |
Bicarbonate |
HCO3– |
Phosphorus |
P– |
|
|
Trace elements µmol/l |
|
Iron |
Fe |
Manganese |
Mn |
Zinc |
Zn |
Boron |
B |
Copper |
Cu |
Molybdenum |
Mo
|
For this analysis, we need 250 ml of the type of water you want to have analysed, such as feed water or drain water. Remember to give the sample a name such as ‘drain water, young chrysanthemums’ or ‘tomato drain greenhouse 1’. We will then add a number code. The name and number will then be stated on the analysis results.